Santorini: Boat tour to Volcano, Hot Springs & Thirasia island

Volcanoes, hot springs, and a quiet island lunch. This five-hour Santorini boat trip packs three very different experiences into one morning: a walk across Nea Kameni, a swim near Palea Kameni, and free time on traditional Thirassia. I like the small-group format of up to 24 people and the chance to see a calmer side of the caldera. The included towel, water, pool noodles, restroom, and glass of local white wine also make the $83 price easier to justify.

The main drawback is that this is not a fully guided sightseeing tour. You hike Nea Kameni on your own, and some departures may give you only a short time at the hot springs or Thirassia if the group falls behind. Bring cash for the €5 volcano fee and cable car, and expect heat, wind, boat spray, and a demanding uphill walk.

Quick facts worth knowing

• Small boat with up to 24 people: The boat feels more personal than the larger vessels seen around the caldera, though space can feel tight in rough water.
• Nea Kameni costs extra: The volcanic island entrance fee is €5 per person, and the walk has no guide.
• Hot springs are warm, not necessarily hot: The water is sulfurous and mineral-rich, but you need to swim from the boat to reach it.
• Thirassia gives you a quieter Santorini: You have time to wander Manolas and eat at a traditional waterfront taverna.
• The Old Port requires planning: The cable car costs €10 each way, and the harbor is also reached by steep steps or traditional donkeys.
• Timing affects the experience: Delays can reduce the planned time at the springs and on Thirassia, so punctuality matters.

Why this boat trip is worth considering

Santorini is often reduced to white houses, blue domes, and sunset crowds. This excursion takes you away from the famous towns and into the caldera itself. You see the volcanic force that shaped the island, swim in warm mineral water, and visit an island that has kept much of its old character.

I like that the route has variety. The volcano stop is active and physical. The hot springs are playful and unusual. Thirassia is slower and more ordinary in the best way, with winding lanes, Cycladic homes, and small tavernas instead of souvenir shops at every turn.

The tour is priced at $83. That is not the cheapest way to see the caldera, but the fare includes the boat, crew, a towel, bottled water, a glass of local white wine, and access to the hot springs. You still pay for food, the cable car, and the €5 Nea Kameni fee. Add those costs before deciding if it fits your budget.

The strongest part of the value is the smaller boat. Several passengers singled out the friendly captain and the less crowded feel. Captains named Panagiotis and Manos received especially warm praise, with Panagiotis noted for his calm, capable handling and Manos described as making the trip enjoyable. The exact captain can vary, but the operator appears to put real emphasis on personable service.

Getting down to Santorini Old Port

The meeting point is Santorini Sea Trips at the Old Port below Fira. The boat leaves at 10:15 in the morning and returns to the same harbor after roughly five hours.

Reaching the port is part of the day. From Fira, you can use the cable car, walk the long stairway, or ride a traditional donkey. The cable car costs €10 each way, which adds €20 to your outing if you use it both directions. That cost is not included, so keep cash or another accepted payment method ready.

The cable car is the simplest option for most people, especially when you are carrying swimwear, towels, and water. Allow enough time to get down, find the meeting point, and deal with possible queues. The boat cannot wait indefinitely for late arrivals, and the schedule is already fairly full.

The Old Port itself has waterfront cafes, tavernas, and shops. It is a scenic place to wait, but do not confuse the port with Fira town above. You need to descend to the harbor before departure, then climb back up after the boat returns.

Nea Kameni and the one-hour volcanic walk

After about 20 minutes on the caldera, the boat reaches Nea Kameni. This dark volcanic island looks stark against the Aegean water, with black rock and a rough, exposed surface shaped by past eruptions.

You get about 1 hour and 15 minutes here, including the walk toward the crater. The route is not presented as a guided hike. You are responsible for staying safe, keeping track of time, and managing the uneven ground.

I would treat this as a real walk, not a quick photo stop. The path can feel strenuous because of the heat, bare rock, and uphill sections. One person specifically found the climb difficult and wished donkeys were available. In August, the sun can make the walk much harder, so a hat, sunscreen, sturdy shoes, and water matter.

The volcanic fee is €5 per person and is not included in the tour price. Bring cash, since this is an easy expense to overlook. The boat supplies one bottle of water, but you may want additional water if you know you struggle in hot conditions.

Because there is no guide on the island, you should not expect a detailed explanation of the crater or volcanic geology. This is a key difference between a boat transfer with free exploration and a specialist geology tour. You get the freedom to walk at your own speed, but not a formal talk at each point.

The reward is the setting. You can see the caldera from a different angle, walk over lava rock, and feel the dry, open scale of the volcanic islands. If you want an effortless morning, this stop may be too physical. If you enjoy short hikes and unusual geology, it is likely the highlight.

Palea Kameni hot springs and the swim from the boat

The next stop is Palea Kameni, a smaller volcanic island known for sulfurous geothermal water. The boat anchors near the hot springs, and you swim from the boat toward the warmer water.

This is not a built-up spa. There are no changing rooms, pools, or easy shore access described here. You enter the sea, swim to the warm area, and return to the boat when your time is up. Pool noodles are provided, which helps you relax in the water, but the stop still requires reasonable swimming ability.

The water contains sulfur, iron, and other volcanic minerals. It may leave a stain on pale swimwear, so wear a dark swimsuit if you care about keeping light fabric clean. The water is warm rather than guaranteed to be extremely hot. One account found it warmer than expected, while another noted that you must keep swimming because the area is deep.

That depth is important. This is not a shallow wading stop for everyone. If you are not a confident swimmer, you may prefer to stay on the boat. A child who could not swim well was unable to enjoy the stop, although the captain was praised for helping comfort the child.

The scheduled time is 30 minutes, but the usable swimming time can be shorter. Boarding and leaving the boat take time, and group movement can be slow. One departure reportedly had less than ten minutes in the water after loading and unloading. That may not happen every time, but you should not assume you will get a long, relaxed soak.

The provided towel is a useful touch. You return it to the staff afterward, so you do not need to pack your own beach towel. Bring a cover-up or warm layer for the trip afterward, since the boat can feel windy when you are wet.

Thirassia for a quieter hour

Thirassia is the most culturally appealing stop. It was once connected to Santorini before the major volcanic eruption, but today it feels far less developed than Fira or Oia.

The boat gives you about 1 hour and 15 minutes on the island. You can walk through the lanes of Manolas, the main village, and stop at a traditional taverna for food and wine. The atmosphere is quieter than Santorini’s best-known towns, and that contrast is a major reason to choose this route.

I like Thirassia because it gives the trip breathing room. After the exposed volcano and the active swim, you can sit by the water, order lunch, and look at ordinary island life. A meal here was described as one of the best of the trip, with the island’s peaceful setting adding to the experience.

Still, keep an eye on the departure time. Delays earlier in the day can eat into this stop. One account arrived with only about 15 minutes left, barely enough to order takeaway food. That is an important warning if lunch on Thirassia is one of your main reasons for booking.

The best approach is to decide in advance what you want here. If you want a full meal, go directly to a taverna. If you prefer photographs and a walk through Manolas, skip a long lunch. Do not expect enough time to do everything if the boat runs late.

The boat, crew, and ride back to Fira

The boat is smaller than many of the larger vessels operating around Santorini. That helps the group feel more personal, and the crew can often respond quickly to individual needs. The captain has been praised for being kind, generous, experienced, and reassuring with children.

The trade-off is space. A smaller boat can feel crowded when everyone is seated, getting into the water, or moving toward the boarding area. Open-water sections can also be choppy, with wind and spray. Bring a light jacket or sweatshirt even on a warm day.

The crew provides a glass of local white wine during the ride. It is a modest serving in a small plastic cup, not a formal tasting, but the wine itself has been well received. Think of it as a pleasant extra while you enjoy the caldera views, not as a major part of the tour.

The return leg is a chance to dry off and enjoy the water from the boat. The trip combines history, volcanic scenery, and local island culture without requiring you to arrange several separate excursions.

Communication before departure has also been useful. The operator has contacted passengers through WhatsApp and helped clarify meeting details and timing. Service animals are allowed, and the tour is near public transportation, although the Old Port itself still requires a cable car ride, stair descent, or donkey ride from Fira.

Who will enjoy this Santorini excursion

I would choose this tour if you want more than a standard caldera cruise. It suits you best if you:

• Enjoy a short but demanding walk over volcanic ground
• Are comfortable swimming in deep water from a boat
• Want a small-group outing rather than a large vessel
• Prefer a mix of nature, swimming, and village time
• Like having free time instead of following a guide every minute
• Can stay punctual and adapt if a stop runs short

It may not suit you if you need step-free access, dislike rough water, or want extensive commentary about the sites. The hike is unguided, and the captain may focus more on safe boat handling than on giving a detailed history lesson.

The tour is also less suitable for anyone who cannot swim confidently. The hot springs are reached in the water, and the area is deep. You can remain on the boat, but that means missing the main point of the stop.

Practical packing advice for the five-hour trip

Wear shoes with a firm sole for Nea Kameni. Flip-flops may be fine on the boat, but volcanic rock and an uphill path call for better support.

Pack dark swimwear because sulfur can stain light colors. Bring sunglasses, sunscreen, a hat, and a light jacket or sweatshirt for wind and spray. The boat supplies a towel and one bottle of water, but extra water and a small snack may be sensible since food is not included.

Keep cash available for the €5 volcano admission and the €10 cable car ride in each direction. Lunch on Thirassia is also extra. If you want to eat there, avoid spending too long at the volcano or hot springs, especially if the boat is running behind.

The experience allows most people to participate, but the combination of stairs, boat boarding, uneven volcanic ground, heat, and swimming makes it more demanding than the five-hour duration suggests. The maximum group size is 24, and a minimum number of participants is required for the departure to operate.

Free cancellation is available up to 24 hours before the 10:15 start time. Cancellations within 24 hours are not refunded. Poor weather can also cancel the trip, in which case you are offered another date or a full refund.

Should you book the Nea Kameni and Thirassia boat tour?

I would book it if you want a compact Santorini outing with real variety. The small boat, helpful crew, volcanic hike, warm-water swim, and quiet Thirassia stop make the $83 fare reasonable, especially when compared with arranging separate boat and island visits.

Go in with realistic expectations. The volcano walk is self-guided, the hot springs may be brief, and Thirassia time can shrink if the group runs late. If you are a capable swimmer, comfortable in the heat, and happy to trade polished narration for freedom and scenery, this is a strong choice.

Skip it if you want a slow luxury cruise or a fully explained historical tour. For active sightseers who want to see the physical side of Santorini, this trip offers a memorable change from the crowded viewpoints of Fira and Oia.

FAQ

How long is the Santorini boat tour?

The experience lasts approximately five hours, beginning at 10:15 am and returning to Santorini Old Port.

Where does the boat tour start and finish?

It starts and ends at Santorini Sea Trips, Anemos Old Port, below Fira.

Is the Nea Kameni entrance fee included?

No. The Nea Kameni entrance fee is €5 per person and is paid separately.

Is the cable car included in the price?

No. The cable car costs €10 each way. You can also reach the Old Port by stairs or traditional donkey.

Do I need to be able to swim?

Swimming ability is important for the hot springs because you enter the water from the boat, and the area is deep. Pool noodles are provided, but you should be comfortable swimming continuously.

What is included on the boat?

The tour includes a restroom, pool noodles, one towel that must be returned, one bottle of water, free time on Thirassia, and one glass of local white wine. Food is not included.